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3.6L break-in

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Old 05-08-2014, 07:45 AM
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Originally Posted by TreyJkOrlando
Don't do that ^

Especially if you're like me and run 100 miles every 2 days. Waste of time and money.
On a rebuild not a factory new engine I actually do it at about 50 miles the first time. I was lucky tho and surrounded with engineers who new how to build engines and make money so not a waste of time in the long run. first few miles on cheap oil so rings seat better.
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Old 05-08-2014, 08:11 AM
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I would just throw in regular oil and change it at 1000 miles. If you just did pistons and rings you won't have as much wear as a new motor breaking in everything. Is this the original motor? in my experience hydrolock causes a lot of lower motor damage.
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Old 05-08-2014, 08:55 AM
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Originally Posted by WINGIT
I would just throw in regular oil and change it at 1000 miles. If you just did pistons and rings you won't have as much wear as a new motor breaking in everything. Is this the original motor? in my experience hydrolock causes a lot of lower motor damage.
This is the new motor that I didn't hydrolock




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Old 05-08-2014, 08:56 AM
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Default 3.6L break-in
Originally Posted by jadmt
On a rebuild not a factory new engine I actually do it at about 50 miles the first time. I was lucky tho and surrounded with engineers who new how to build engines and make money so not a waste of time in the long run. first few miles on cheap oil so rings seat better.
So just cheap store brand oil?
Or just normal Dino oil?

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Old 05-08-2014, 09:01 AM
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Originally Posted by supdoggen
Many people have zero issues with their engine break-ins, problem is that if you do have issues that the break-in oil would prevent your engine may not go 100 miles. Break in oil has zinc in it designed to keep metal parts from grinding on each other when soft so....bad... I don't know all about it, I've heard you don't really need it for certain parts but I've never done a partial rebuild so I never looked into it. Don't even know how long you should run it as I've always changed it after a cam break in period.
Yeah I just wanna be sure it was a lot if work and a lot of late long nights and a week without a jeep so I don't want to go they it again haha


Originally Posted by TreyJkOrlando
Yep. I'm sure if you stop by the parts department at your local dealership they can order you some actual break-in oil, but just to warn you, it's pretty expensive. Go through the normal break in process and then do your oil changes after that as regular ones. (Using whatever oil you prefer). As long as you did everything correctly you should be golden. Just stay out of lakes lol
So your recommendation is just don't use it? I'm just afraid cuz I want the rings to seat properly which is advertised on certain break in oils but not too many. Last time I was at the stealership picking up parts the guy just said take it easy for 500-1000 miles with short bursts of heavier acceleration but I forgot to ask about break in oil. I asked my boss today and he said he's never used break in oil



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Old 05-09-2014, 09:46 AM
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Originally Posted by Cjacks95
This is the new motor that I didn't hydrolock




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So... why are you replacing the rings in the new motor?
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Old 05-09-2014, 09:48 AM
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Originally Posted by Invest2m4
So... why are you replacing the rings in the new motor?
Had low compression because of the rings


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Last edited by Cjacks95; 05-09-2014 at 09:55 AM.
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Old 05-09-2014, 10:32 AM
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Originally Posted by Cjacks95
Had low compression because of the rings


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Is that a common issue with the 3.6? Never heard of that.

That said, the simple solution is to just mill the heads! lol
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Old 05-09-2014, 10:34 AM
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Originally Posted by Invest2m4
Is that a common issue with the 3.6? Never heard of that.

That said, the simple solution is to just mill the heads! lol
Not really I guess. Never heard of it before.




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Old 05-09-2014, 12:52 PM
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I'm guessing this was a used 3.6L that you partially rebuilt.
If you're just breaking in Rings and Pistons, I would run regular Dino and change after 1000 miles.
Drive it at varied speeds for first 500.
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